Sectional mold.



R. R. ROBERTSON & Cx G. NAYLOR.

sEcTloNAL MOLD.

APPLICATION FILED OCT. IB, I9I3.

Patented'Apr. 20, 1915.

2 SHEETS-SHEET l.

W ML

R. n. ROBERTSON'II c. G. NAYLOII.

SECTIONAL MOLD.

APPLICATION FILED 001.18, 1913.

Patented Apr. 20, 1915.

2 SHEETS-SHEET 2.

ROBERT E, ROBERTSON, OF LA GRANGE, AND CARL G. NAYLOE, or CHICAGO, ILLINOIS.

SECTION AL MOLD.

Specification of Letters Patent. i

implication mea october 1s, 191s; serial No. 795,830.

To all whom t may concern Be it known that we, ROBERT R. ROBERT- sON and CARL G. NAYLOR, citizens of the UnitedStates, respectively residing at La Grange, in the county of Cook and State of Illinois, and at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sectional Molds, of which the following is a specification.

Our invention relates to improvements in molds for columns, posts and the like.

Our invention has especial reference to sectional molds, of the character to be hereinafter described, for use in molding columns, posts'and the like for' buildings and other structures.

Some of the most important objects of our invention are to provide durable and strong mold members in which the sections are preferably interchangeable; which will not permit leakage of the substance of the contained grouting, of. which the columns, or posts, are to be composed, so arranged that the outwardly exerted pressure, due to the contained material, will serve to increase the completeness or unity of the integument,

and so constructed that the parts may be quickly and easily .assembled and subsequently knocked down.

Other and further objects of our invention will become readily apparent to persons skilled in the art from a consideration of the following description when taken in conjunction with the drawings, wherein- Figure 1 isv an elevation of a portion of three like, vertically disposed, complete mold sections. Fig. 2 is a cross sectional view taken on line 2 2 of Fig. 1. Fig. 3 is an enlarged perspective view of the means employed for holding the inclosing segments in place. Fig. 4 is a modification of a portion of the device, shown in Fig. 3. Fig. 5 shows a lsegment of one of the encompassing rings. Fig. 6 is a cross sectional View of a modification.

In` all the views the same reference characters are employed to indicate similar parts.`

The component parts ofv themold sections 10, 11 and 12 are substantially the same' in each section. That is to say, the three severed sections are preferablymade up of parts of the same general character and dimensions and the three inclosing members of each section, 13, 14, and 15,

shown in Fig. 2, are substantially the same, or are substantially .the same with respect to size and configuration, so that the proper .vertical edge of any one of the sections with its Joint making parts attached will coperate with'the neat, proper, vertical edge of any other of the sections.

While we shall hereinafter describe a structure having a generally round or cylindrical cross section, it is manifest that the principlesinvolved in the structure are equally applicable to molds in which the wallsv are angularly disposed, such as required for square, hexagon, or Octagon columns, or the like.

While we shall specifically refer to coacting joining parts of the respective cylindrical segments, it is evident that the same description applies to all such joints of the structure and therefore the respective joints will have applied thereto the same reference characters, consistent with the characters designating the respective parts of one cylindrical section.

Referring to Fig. 8 it will be observed that an angle bar 16, has its plate 16 secured in vertical position, to one edge of the cylindrical segments 14, as by means of electric spot welds, or the like 17, which are applied near the remote vertical, eXtreme outer edge of the contacting plate ofthe angle bar, so as to provide fulcrum means upon which the angle bar 1G may be oscillated to some extent and located a short distance back from the interlapped or underlying segments 14, for introduction of free edge of the segment 13, in putting the parts together. It is of course evident that rivets or screws may be used instead of the spot welds 17, if desired, for the purpose of securing these parts together and accomplish the same result. It is also apparent that a shim 18, may be included between the contacting plate of the angle bar 16, and the segment 14 when it is desired to increase the Width of the space 18 to accommodate thicker material, of which the cylindrical segments may be made. When the shim 18 is employed the spot welding or riveting may be accomplished in the same manner as illustrated in Fig. 3 whereby the three parts 14, 16 and 18 are joined together 1nstead of two, the expedient of using a shim where needed being well understood, by persons skilled in the art, and quite a common procedure.-

The'radially disposed vertical plate 17 of the angle bar 16 is set back from the forward edge 19 of the cylindrical segment 14 so as to provide suiiicient space for the interlap of the free edge of adjoining cylindrical segment 13.

At suitableintervals through the radial plate 17 of the angle bar 16, we out L shaped apertures 20, for insertion ofthe segments 21 of the encompassing ring. The ends of the ring segments are so formed that they may be readily inserted in the wider part 20 of the aperture 20 and pressed down into the narrower throat part 20, after being so inserted. -The ends of the ring segments 21, are cut away as at 22, to avoid the circumferentially disposed plate member. 1620i theangle bars 16 and are each provided with a notch 23, at each end, which are insertedrinto the apertures contained in the radially disposed plate member 17 of the angle bar, when the ring 21 has been placed in position as shown in Fig. 3. This notch 23, together with the plate member 17 of the angle bar, determines the true diameter of the integument, when the parts have been properly placed in position.

Pivoted to the plate member 17 of the angle bar, as at 23', is a latch 24. When this latch-24, is moved to a substantial vertical position or parallel with the member 17 the end of the latch is brought into substantial contact with the upper ring segment of the two that are included within the notch 20 and it thus prevents the accidental displacement of the ring segments. There is suiicient rietional engagement between the latch and the member to which it is pivoted to prevent its accidental displacement and thereby it is held in place and retains the encompassing ring segments in their respective positions without possibility of accidental removal.

It is well within the practice of our invention to make molds of smaller diameter and use parts of the members that have previously been employed for molds of larger diameters.

In Fig. 6 it will be observed that the segments 14 and 15 are of substantially the same dimensions as shown in Fig. 2, and that cylindrical segment 13 is circumferentially smaller and that the total diameter of the structure is smaller than that shown in Fig. 2, for this reason. In this event the rings 21 must be made of Vdimensions corresponding with the new diameter, as will be well understood by persons skilled in the art. This arrangement permits a large variety of molds to be built up from a relatively smallnumber of pieces.

Figs. 1V and 2 show the ends of adjoining moldv sections interlapped. To accomplish this we stop the angle bars 16, an inch or l two short of the cylindrical segments, as

clearly shown in Fig. 1, so that there will be sufficient resilient displacement of the sheet metal segments to permit the introduction of the segments of the adjoining member. To more conveniently accomplish this result we place the vertical joints of the respective cylinders in staggered relation so that the joints of one section is substantially midway between the joints of the adjoining section and it will be further noted that the superposed section has the radially extended plate member 17 of the angle bar resting upon and supported by the upper edge of the cylindrical sub-section thereby iirmly and positively supporting the upper seotion and affording a convenient and reliable means of placing the respective sections in true vertical alinement.

The overlapping of the plate member 16 of the angle bar 16, of the adjoining segment 13, for insta-nce, and the overlapping relaf tion of the respective cylindrical parts at the joints, provide a tortuous passage Jfor any material that may be contained within the molds and it is further to be noted that the outwardly exerted pressure eiected by the contents of the molds will press these parts into closer relation thereby improving the joints that otherwise exist between the vertical edges of adjoining sections. v

Thedevice is easily put together and may be readily and quickly taken apart. After the mold has served its purpose and it is desired to remove it from the containedl column it is only necessary to move the latch 24into position shown in Fig. 3 and to slightly drive the ring segments 21 up in the aperture 20 until they are brought into register with the wider portion thereof 20 when they may be quickly and easily taken from their respective positions. It will be observed that the cut away portion 22 of the ring segment is of greater extent than the corresponding portion 22 so that in takingv the rings apart, they may be moved circumfcrentially, as permitted by the extended out away portion 22, so that the head of the ring at the other end may be freely and expeditiously taken from the aperture within which it had formerly been inclosed.

It will be observed that the disposition of metal in this structure is the very best that can be made to aii'ord the greatest strength and advantage for the quantity used. The edge presentation of the ring 21 to the vertical sides of the cylindrical inclosing segments is such as to afford the very greatest strength to resist the internal pressure within the mold and the vertical and radial disposition o'l the plate portion 17 of the angle bar, in conjunction with these rings affords longitudinal support to the respective segments at the points where the joints are made.

While 'we have herein shown and described a single embodiment of our invention for the purpose of clear disclosure it is evident that considerable change in arrangement and dimensions of the parts may be made Within the scope of the appended claims.

Having described our invention, what We claim is 1. In a device of the character' described, a plurality of mold segments; a radially disposed plate secured to each segment and having perforations at suitable intervals, and ringsegments extending from plate to plate and bearing notches at each of their ends for engagement with said perforations in said plates.

2. In a device of the character described, a plurality of mold segments; al1-angle bar .having one of its flanges secured near to the circumferential marginal edge of each segment, in such manner as to permit the inclusion of the edge of the adjacent segment between said bar and its attached segment, the other, radially-'disposed flange of said angle bar, bearing perforations atvintervals along its longitudinal extent, and ring segments; having their greatest dimensions lying in planes at right angles to the surface of the mold and removably secured at their ends in the perforations of said adjacent angle bars.

3. In a device of the character described, a plurality of inclosing mold segments; angle bars secured to each segment and having, at intervals, perforations radially Wider at one end than the other; ring segments, to encompass said mold structure, notched at their ends and adapted to enter the larger portion of said perforation and to engage the bar in the-smaller portion thereof and a latch to cover the larger portion of said perforation to retain said segments in place.

In testimony whereof We hereunto set our hands.

ROBERT R. ROBERTSON CARL G. NAYLOR. In the presence of- FoRE BAIN,

MARY F. ALLEN. 

